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Non Return Valves

106  results were found
Non Return Valves

Our non-return valves protect tubing and vacuum systems from backflow when pressure falls in the system. Sealing system eliminates backflow, helping to prevent upstream contamination or damage. These valves are compatible with a wide range of systems, all with different specific levels when dealing with the three main pressure values: cracking pressure, maximum pressure, and back pressure created. Durable steel or plastics are used in all designs, with spring loaded, creating a quality product that will remain independent for years with no need for replacement.


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Description:   Active Inlet Valve (AIV) Replacement Cartridge, 600 bar
Catalog Number: 10123-660
Supplier: Optimize



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Description:   PerformancePLUS Check Valve Cartridge, for HPLC Systems, Model Number: 1515, 1525, 2690, 2695, 2795, 510, 515, 600, 610
Catalog Number: 10853-420
Supplier: Restek



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Description:   Check Valve, Outlet for Shimadzu LC-20AD/B, Similar to Shimadzu# 228-45705-91
Catalog Number: 10853-702
Supplier: Restek



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Description:   PTFE VALVE WITH ONE 1/4" MALE NPT CONNECTION AND ONE 1/4" OD TUBE COMPRESSION CONNECTION.
Catalog Number: 89052-616
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   Bottom Vent Valve for HPLC, 1/16 inch Fittings, 1/4-28, Material: Stainless Steel, Includes: Nuts and Ferrules, low internal volumes and are rated to 15,000 psi (103,421 kPa), two-piece stem assembly in which the rotating upper shank is coupled through a ball joint
Catalog Number: 10853-600
Supplier: Avantor



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Description:   Outlet Check Valve for Shimadzu LC-600, LC-9A, LC-10AD, LC-10AT, Similar to Shimadzu# 228-18522-92
Catalog Number: 10853-440
Supplier: Restek



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Description:   This Guarantees 3 Bubbles/Minute Or Less In The Industry Standard Nitrogen Bubble Test; Common Acceptable Standards Are 12 Bubbles Or Less.
Catalog Number: 89522-316
Supplier: Optimize



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Description:   PTFE VALVE WITH ONE 1/8" FEMALE NPT CONNECTION AND ONE 1/4" FEMALE NPT CONNECTION.
Catalog Number: 89052-614
Supplier: Ace Glass


Product available on GSA Advantage® Small Business Enterprise

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Description:   For 1/16 inch OD tubing, 1/4-28 threads, with flangeless fittings
Catalog Number: 21511-160
Supplier: Upchurch Scientific



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Description:   Ultra-Low Volume, Low Flow 100 psi (7 bar) With Flangeless Fittings & 1/16 OD PEEK* Tubing (.010 ID)
Catalog Number: 53501-328
Supplier: Upchurch Scientific



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Description:   Ball Valve, Shut-Off Gas Valve, Size: 1/8in, Material: Stainless Steel, Accessory for gas chromatography
Catalog Number: 10803-334
Supplier: Restek



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Description:   Check Valve Cartridges (2) for Waters Alliance, Similar to Waters #WAT270941, 2-pk.
Catalog Number: 10853-584
Supplier: Restek



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Description:   With PEEK* polymer body and perfluoroelastomer disc, featuring 0.060in through-holes for higher flow rates
Catalog Number: 97055-072
Supplier: Upchurch Scientific



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Description:   For Beckman 100A, 126 systems. Contains 2 Inlet housings and cartridges & 2 Outlet housings and cartridges.
Catalog Number: 83008-432
Supplier: Optimize



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Description:   Inlet Check Valve for HPLC Systems, Model Number: Int. 4000, 1, 10, 2, 200 Series, 250, 3, 3B, 4, 400, 410, 620, Series 200 Micropump
Catalog Number: 10853-476
Supplier: Restek



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Description:   The 4.7mm ruby ball will quickly open and depressurize the reservoir before the mobile phase can rise up the tubing.
Catalog Number: 53500-818
Supplier: Upchurch Scientific



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